I know some rules of normal Texas Hold'em (I am a beginner of poker), but what I don't understand is the rules of zynga poker on facebook. It's absolutely normal there, that people with worse combination beat people with better combination eg:

Nur won the pot ($2,884) with one pair of J's and K kicker. << worse cards but better win
Petr won the pot ($220) with two pairs J's and 2's with K kicker. << better cards but almost no win

also: how is it possible that multiple people win there each turn? Shouldn't only 1 person with best hand win?